Manufacture of threads, filaments, and the like of cellulose



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Patented Feb. 20, 1923.

STATES PATENT QFFIQE.

HQBACIE JAMfi BEGAN, 0F COVENTRY, ENGLAND, ASSIGNOR TO COURTAULDS FEED,OF LONDON, ENG.

N'UFACTUBE OF THREADS, FILAMENTS, AND THE LIKE 0F GELLULOSE.

1570 Drawing To all whom it may concern:

Be it known that, I, Homer: J AMES HEGAN, a subject of the King of GreatBritain, residing at Spring House, Redford Road, in the city ofCoventry, England, have invented new and useful Improvements in orConnected with the Manufacture of Threads, Filaments, and the like ofCellulose, of which the following is a specification.

This invention relates to the manufacture of threads, filaments, and thelike, from viscose, in the preparation of which cotton has been used asthe source of cellulose, including under the term cotton any suitablekind of cotton, such, for example, as long fibred cotton, or cottonwithshort fibres such as is obtained from cotton-seed hulls.

In the production of threads, filaments, and the like, of cellulose, byprojecting the said viscose through small orifices into a bath having anacid reaction, such, 'for instance, as a bath containing sulphuric acidand a sulphate with, or without, the addi tion of other suitablecompound, or compounds, such, for instance, as glucose and a Zinc salt,there is generally a tendency, especially in the spinning of finefilaments, for one, or more, of the threads, filaments, or the like, tobreak,cand for globules of viscose, more, or less, coagulated, to format the nozzle and pass up withthe thread onto the winding apparatus.This causes unevenness of the resulting thread, and such unevenness isgenerally not desirable.

According to the present invention the "tendency to break and form suchglobules is reduced by introducing into the viscose,

either as such, or during the preparation thereof, a substance, whlchlowers, or substances which lower, the surface tension of the viscose incomparison with the spinning bath employed, such substance, orsubstances, having either in itself, or themselves, or by reason of thesmall quantity used, practically no setting action on the viscose, andneither it, or they, nor its, or their, decomposition products havingany injurious, or objectionable, efiect upon the 1 name to (31118SPEClfiQ'zttlOIlflIl the presence of threads, filaments, or the like. 1

Provided that the viscose, when ready for-f conversion into threads andthe like, con

rectly to the viscose, or in any suitable man- Application filed March31, 1922. Serial No. 548,530.

ner to any one, or more, of the ingredients employed in the ultimatepreparation of the viscose, or of any of the intermediate products,although it is preferred to prepare the alkali cellulose in the absenceof such substance, or substances.

I give the following as an example of how this invention may beperformed, without restricting the invention. to this example. 'Iwoparts by weight of sodium oleate are introduced into the materials fromwhich ten thousand parts by weight of viscose are prepared, the sodiumoleate being preferably dissolved in the water, or dilute alkaliemployed for the solution of the cellulose xanthate. The viscose; afterbeing prepared, and after having attained the desired ripeness, ispassed through a nozzle containing orifices of the' desireddiameter,into a bath containing sulphuric ,acid, sodium sulphate, and glucosetogether with a small quantity of a zinc salt.

What I claim is 1. In the manufacture of threads, filaments, and'thelike, from viscose prepared from cotton, the introduction into thesetting bath of cotton-viscose containing a substance which will lowerthe surface tension of the viscose.

2. In the manufacture of threads, filaments, and the like, from viscoseprepared from cotton, the introduction into the setting bath ofcotton-viscose containing .so-.

the said sodiumv oleate being present in approximately the proportion oftwo parts by weight to-.ten thousand parts by weight of viscose;

In testimony whereof I have signed my two subscribing witnesses.

nonlion Janine HEGAN. Witnesses WILLIAM. HENRY S'roKEs, JOHN ALEXANDERLLDYD,

